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48 lines
941 B
Python
48 lines
941 B
Python
#
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# RTEMS Chains Support
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# Copyright 2010 Chris Johns (chrisj@rtems.org)
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#
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# $Id$
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#
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import gdb
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class node:
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"""Manage the Chain_Node."""
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def __init__(self, node_val):
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self.node_val = node_val
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def null(self):
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if not self.node_val:
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return True
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return False
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def next(self):
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if not self.null():
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self.node_val = self.node_val['next']
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def previous(self):
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if not self.null():
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self.node_val = self.node_val['previous']
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def cast(self, typename):
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if not self.null():
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nodetype = gdb.lookup_type(typename)
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return self.node_val.cast(nodetype)
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return None
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class control:
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"""Manage the Chain_Control."""
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def __init__(self, ctrl):
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self.ctrl = ctrl
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def first(self):
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t = node(self.ctrl['Head']['Node'])
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return t
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def last(self):
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return node(self.ctrl['first'])
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